Active Directory Helper

ActiveDirectoryHelper.cs

    public static class ActiveDirectoryHelper
    {
        public static string GetSystemDomain()
        {
            try
            {
                return Domain.GetComputerDomain().ToString().ToLower();
            }
            catch (Exception ex)
            {
                //LOG
                return string.Empty;
            }
        }

        public static ActiveDirectoryUserInfo GetUserInformation(string username, string passowrd, string loginUserName)
        {
            Cursor.Current = Cursors.WaitCursor;

            var domain = GetSystemDomain();
            if (string.IsNullOrEmpty(domain)) return null;

            var rs = SearchUserByUserName(GetDirectorySearcher(username, passowrd, domain), loginUserName);
            if (rs == null) return null;

            var activeDirectoryUser = new ActiveDirectoryUserInfo();
            if (rs.GetDirectoryEntry().Properties["samaccountname"].Value != null)
                activeDirectoryUser.UsernameDisplay =
                    rs.GetDirectoryEntry().Properties["samaccountname"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["givenName"].Value != null)
                activeDirectoryUser.Firstname = rs.GetDirectoryEntry().Properties["givenName"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["initials"].Value != null)
                activeDirectoryUser.MiddleName = rs.GetDirectoryEntry().Properties["initials"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["sn"].Value != null)
                activeDirectoryUser.LastName = rs.GetDirectoryEntry().Properties["sn"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["mail"].Value != null)
                activeDirectoryUser.EmailId = rs.GetDirectoryEntry().Properties["mail"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["title"].Value != null)
                activeDirectoryUser.Title = rs.GetDirectoryEntry().Properties["title"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["company"].Value != null)
                activeDirectoryUser.Company = rs.GetDirectoryEntry().Properties["company"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["l"].Value != null)
                activeDirectoryUser.City = rs.GetDirectoryEntry().Properties["l"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["st"].Value != null)
                activeDirectoryUser.State = rs.GetDirectoryEntry().Properties["st"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["co"].Value != null)
                activeDirectoryUser.Country = rs.GetDirectoryEntry().Properties["co"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["postalCode"].Value != null)
                activeDirectoryUser.Postal = rs.GetDirectoryEntry().Properties["postalCode"].Value.ToString();

            if (rs.GetDirectoryEntry().Properties["telephoneNumber"].Value != null)
                activeDirectoryUser.Telephone =
                    rs.GetDirectoryEntry().Properties["telephoneNumber"].Value.ToString();

            return activeDirectoryUser;
        }

        private static DirectorySearcher GetDirectorySearcher(string username, string passowrd, string domain)
        {
            try
            {
                return new DirectorySearcher(
                    new DirectoryEntry("LDAP://" + domain, username, passowrd));
            }
            catch (DirectoryServicesCOMException ex)
            {
                //Log
                return null;
            }
        }

        private static SearchResult SearchUserByUserName(DirectorySearcher ds, string username)
        {
            ds.Filter = "(&((&(objectCategory=Person)(objectClass=User)))(samaccountname=" + username + "))";
            ds.SearchScope = SearchScope.Subtree;
            ds.ServerTimeLimit = TimeSpan.FromSeconds(90);
            return ds.FindOne();
        }

        private static SearchResult SearchUserByEmail(DirectorySearcher ds, string email)
        {
            ds.Filter = "(&((&(objectCategory=Person)(objectClass=User)))(mail=" + email + "))";
            ds.SearchScope = SearchScope.Subtree;
            ds.ServerTimeLimit = TimeSpan.FromSeconds(90);
            return ds.FindOne();
        }
    }
    
        public class ActiveDirectoryUserInfo
    {
        public string UsernameDisplay { get; set; }

        public string Firstname { get; set; }

        public string MiddleName { get; set; }

        public string LastName { get; set; }

        public string EmailId { get; set; }

        public string Title { get; set; }

        public string Company { get; set; }

        public string City { get; set; }

        public string State { get; set; }

        public string Country { get; set; }

        public string Postal { get; set; }

        public string Telephone { get; set; }
    }